Controlling mechanism for internal-combustion engines.



- R. s, SMITH. CONTROLLING MECHANISM FOR INTERNAL COMBUSTION ENGINES.

Patented. June 27', 191

APPLICATION FILED MAY 27, I915- li I w? mm IIIIIII I 40, tinnedoperation of the e "PAT NT OFFICE;

REUBEN STANLEY SMITH, or MILWAUKEE, wrscousmfassmnon TO A. o. sm'rn ICOMPANY, on MILWAUKEE, WISCONSIN, A CORPORATION or 'wrsconsm.

CONTROLLING MECHANISM FOR INTERNAL- COMBUSTION ENGINES.

Continuation of application Specification of Letters Patent Patented June 2'7, 1916.

Serial No. 857,692, filed August 20, 1914'. This application filed May27, 1915.

Serial No. 30,768.

To all whom it may concern Be it known that'I, REUBEN STANLEY SMITH, acitizen of the United States, re siding at Milwaukee, in the county ofMil- 5 waukee and State of Wisconsin, have in vented a certain new anduseful Improvement in Controlling Mechanism for Internal-CombustionEngines, (Case 8,) of which the following is a full, clea'iyconcise, and

exact description, reference being had to the accompanying drawings,forming a part of this specification.

' My invention relates to controlling mechanism for internal combustionengines, and

has for its object the provision. of means whereby simple and efi'ectivecontrolling means may be employed in connection with the engine so asto'easily control the operation thereof.

This is a continuation of my co-pending' application, Serial No.857,692, filed August 20, 1914, one of the mOdifiCatlODS incorporatingan improvement thereon.

Generally, the device of my invention consists in a lever attached tothe exhaust valve of an internal combustion engine. Secured to thislever is a controlling means, preferably in the form of a wire orflexible member which extends to a position where the opcra tor mayeasily manipulate the same. Also secured to this wire is the throttle ofthe carbureter so that by operating the wire the throttle of thecarbureter may be opened or closed as desired. The throttle and theexhaust valve are so connected that operation of the controlling wire inone direction causes the throttle valve of the carburetor to completelyor almost completely close, before the exhaust valve is operated, aconwire inthe same direction lifting the exhaust valve. from its seatthereby preventing compression within the combustion chamber of theinternal com- .bustion engine. When the controlling wire is moved in theopposite direction he exhaust valve will be first seated and then'thethrottle valve opened to provide a free p assage. way from thecarlmreter to the intake manifold of the engine. By means ofthe deviceof my invention l am enabled to control both the. throttle valve oi thecarburetor and the exhaust valve byvirtue of one controlling means.

supply reservoir to the engine.

My invention will be more clearly under" stood by referring to theaccompanying I drawings in which,

Figure 1 is aview partly in elevation and partly in section of a portionof an internal combustion engine, provided with the controlling means ofmy invention; and Fig. 2 1s a view similar to Fig. 1 of a'slightlymodified form of'controlling means.

. In- Fig, 1, 3' illustrates the cylinder of the internal combustionengine provided with an phaustport 4 and an exhaust valve 5 seated inthe walls of the exhaust port. The exhaust-valve 5 is provided with adown- .Wardly extending rod 6 terminating in a collar 7 rigidly fixed tothe rod. Fitting, against a downwa ly extending boss 7 of the enginecylinder 3 is a forked spacer 8 provided with prongs 9 between which andthe collar 7 is interposed a spring 10. This spring 10- serves tonormally hold the exhaust valve 5 in its down, or closed, posi- '75tion. Movably mounted in the crank case of the engine, illustrated'at11, is a plunger 12 arranged' when operated to engage the lower end ofthe rod 6 to lift the rod, and, therefore, the exhaust valve 5, from itsseat to providea passage way from the combustion chamber of the engineto the exhaust manifold. The plunger 12, as is well known in the art, isconnected with the crank shaft. of the engine and is timed so as tocause the exhaust valve 5 to open at the desired time. Bolted, orotherwise secured, to the top of the cylinder 3 is a casing or manifold13. Themanifold is provided,.\\'ith the usual passage way 14 extendingto the supply chamber of a carburetor. The casing 13 is also providedwith a tubular cham- 'ber 15 cxtending at right .a -igles'to the chamber1-1. Arranged to operate withinthis chamber 15 is a throttle'valve 16 in96 the form of a. cup having its base rigidly fixed to the controllingwire, 17. This wire 17 extends upwardly from the throttle valve througha cap 18 screw.threaded in the carbureter, asillustrated. Ifde'sired aflexible,100 guard 1!) may be used surroumling the wire 17 from thecarburcter to the operator. The throttle valve 16 in the. drawing isillustrated in its open position so that a free passage of the fuel ispermitted from the To normally retain the throttle valve in its openposition, I provide n spring interposed between the'cover 18 and thethrottle valve.

Git

The controlling wire 17' extends downwardly through an arm 21carriedb'y' a bifurcated lever 22. The lever 22 is pivoted at 23 to someportion of the internal con bustion engine casing, illustrated at :24.The

lever, as illustrated, extends outwardly and has its bifurcated endembracing the rod 6 of the exhaust valve 5, its. upper face an gagingwith the lower face of the collar 7. The controlling wire l'l extendsdownwardly a certain distance below the lower face of the lever 22 andcarries an enlarged por-' tion 25.

From the description thus far given it will readily be seen that thethrottle valve 16 may be opera-ted without: in any way interfering'withthe exhaust valve mechanism. If it is desired to raise the exhaust valve5 from its seat so as'to relieve the engine of compression, as," forinstance, when it is desired to start the engine, the controlling wire17 is pulled upwardly by the operator thus moving the throttle valve 16-to its closed position. \Vhen the throttle valve has reached-its closedposition, or nearly so,

the enlarged portion 25, carried by the lower end .of the controllinwire, cn 'a 'es h n h the lowerface of the bifurcated lever 22.

As the-upward movement oi'thc controlling wire is then continued theportion will cause the lever to be moved to the position indicated indotted -lines, tl'icrefore moving the exhaust valve 5 upwardly and offits seat against the tension of the spring 10. The crank shaft of theengine may now be revolved comparatively easily until a certain speed isobtained when the wire 17 is released or moved downwardly "to cause theexhaust valve to again assume its seated position. The throttle valve16'1nay then be operated in the usual way to control the operation ofthe cngrii'ic.

1n the slightlymodified form illustrated in Fig. the exhaust valve isillustrated at 5, its cmiperatii'ig'rod at (3, the plunger mechanismzit-l2, and the cranlv' casing at turn connected to the/throttle valve31 in the intake manifold 32. The manifold is bolted, or otherwisesecured, to the engine casing provided with a port register- The outerend 0f ing With the intake port 3.3 of the engine.

The throttle valve 31 is arranged to reciprocate in a circular chamber34- of the inanifold, a passage way being employed between the fuelchamber of the carbureterand the chamber 34. This passage way is notillustrated in the drawings for. the reason that it has been broken awayin order to more clearly reveal the devices associated with the throttlevalve. The throttle valve 31,'as

illustrated, is rigidly secured to the -rod- 30 which extends upwardlyand carries at its upper end an enlarged portion 35 between.

which and a cup 36 is disposed a spring 37. This spring 3'2 serves tonormally hold the rod 30, and thus the throttle valve 31, in its up, oropen, position. The throttle valve 31., lllnistrated in the drawings,'1sshown in its closed position, the controlling wirel'l hav ing beenpulled a certain distance to cause the throttle valve to assume thisposition. now, a continued pull is placed on the controlling wire 17 thebifurcated lever 22 will be rotated in a clockwise direction therebycausing its inner, or bifurcated, end to engage with the nut 28 carriedby the plunger mechanism 12. As this bifurcated end engages the nut andraises it the plunger mechanism will engage the rod 6 of the exhaustvalve 5, and-thus raise/it or remove" it from its seat thus providing apassage way between the combustionchamber and the exhaust manifold ofthe engine;

Having thus described my invention what I claim as new and desire tosecure by Letters Patent of the United'states is:

1. A device of tlurclass described, con'r prising an internal combustionengine, a

throttle for controlling the supply of corn bustible fluid to theengine, an exhaust valve I for said engine, means for normally retainingthe throttle in open position, a wire ex tending from the throttlearranged. when operated to close the throttle, and means interposedbetween the throttle and'cxhaust valves whereby the latter is openedwhen the throttle valve is moved to closed position.

2. A device of the class described, comprising an internal 'con'ibustionengine, a throttle forcontrollingthe supply of coinbustible fluid to theengine, an exhaust valve for said engine, means for normally retainingthe throttle in open position, a wire e2;-

tending from the throttle arranged. when operated to. close thethrottle, and means interposed between the throttle and exhaust valveswhereby the latteris opened when the throttle valve is moved to closedposition,

said last-mentioned means having lost-inotion connection with theexhaust? valve.

3. A device of the class described, co1nprising an internal combustionengine, a throttle valve forv CODtI'OlllIlg the supply of combustiblefluid to the engine, an exhaust valve for said engine,manually-controlled devices for operating the throttle valve, and meansarranged to open the exhaust valve when the throttle valve is moved toclosed position.

4. A device of the class described, comprising an internal combustionengine, a piston valve controlling the supply of combustible material tothe engine cylinder, a spring normally tending to hold the-piston valvein open position, an exhaust valve for said cylinder, engine-operateddevices for cyclicly operating said exhaust valve, means formanually-operating the piston valve, and means connecting the pistonvalve and exhaust valve whereby the latter is moved to open positionwhen the piston valve is moved to closed position.

5. Adevice'of the class described, coinprising an internal combustionengine, a

throttle controlling the supply of combustible fluid to the enginecylinder, an exhaust valve for said cylinder, means for manuallyoperating the throttle valve, and a lost-motion connection between thethrottle valve and.

R. STANLEY SMITH.

Witnesses:

LEVERETT C. WHEELER, IRMA D. BREMER.

